WO1987004028A1 - Magnetic transmission - Google Patents
Magnetic transmission Download PDFInfo
- Publication number
- WO1987004028A1 WO1987004028A1 PCT/GB1986/000787 GB8600787W WO8704028A1 WO 1987004028 A1 WO1987004028 A1 WO 1987004028A1 GB 8600787 W GB8600787 W GB 8600787W WO 8704028 A1 WO8704028 A1 WO 8704028A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic field
- data
- transmitted
- transmitting
- generating
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000006698 induction Effects 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000005355 Hall effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
Definitions
- This invention relates to a data transmission system.
- the invention relates to magnetic induction transmission, over a distance, of data such as voice, measurements ⁇ computer bytes, video, etc, that is any analogue or digital signals that can be processed onto a modulated carrier or; in such configuration that it can be Q transmitted and recognised by the systems using this invention.
- a data transmission system comprising means for generating a S magnetic field means -for effecting variations to said magnetic field in correspondence with data to be transmitted, means for transmitting said varied magnetic field, and means for receiving and decoding said transmitted magnetic field in order to retrieve the transmitted data.
- a method of transmitting data comprising the steps of generating a magnetic field; varying said magnetic field in correspondence with data to be transmitted, transmitting 5 said varied magnetic field and receiving and decoding said transmitted magnetic field in order to retrieve the carried data.
- the invention involves the transmission of signals by generation of a recognisable magnetic field (preferably by modulation) and reception of the signal by measurements of the transmitted magnetic field as a vehicle for transfer of information.
- a data transmission system comprises a magnetic field transmitter 1 which receives data from a number of data collection devices 2 which in the particular application illustrated could be temperature, pressure, flow rate; etc.
- the transmitter 1 is located in a bore hole 20 and encodes the data transmitting it through the creation of a modulated magnetic field, which is received by a receiver 10 located, for example, on the sea ⁇ bed.
- the receiver may be a receiver 11 located on a drilling platform, a receiver 12 located on a floating vessel or a receiver 13 located on-shore.
- the generation of the transmitted magnetic field may be provided, for example; by electrical coil induction within a body of matter; the reception being made by measurements with sensors responding to magnetic field variations such as magnetometers, Hall effect generators, fluxgates, induction coils, etc.
- this invention has a large variety of applications making use of signal differentiation by frequency or amplitude modulation; phase shift or rotation, time delay, etc.
- the invention finds applications in the transmission of signals in environments not easily permeable to, or saturated by, electro-magnetic waves; such as environments buried within or shadowed by a large land mass, concrete shelters or other constructions; under water, etc.
- the invention is particularly useful for the transmission of data and information collected deep inside hydrocarbon or geothermic wells, where pressures, temperatures and flows are recorded for good management of the reservoirs; inside mines and natural caves for communication and safety; underwater for communication, navigation and data gathering between surface and submerged boats, beacons, automatic recording stations, remotely operated wellheads, etc. all without the use of hard wired links between the transmitter and receivers.
- the described mode of transmission is not limited to earth bound applicatons, and the invention has application in space or within or outside of anybody of matter, provided that this body of matter does not, by the physics of its properties, attenuate too quickly the magnetic field (principal mode of transfer of information) generated for the signal transmission.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
A system and a method for data transmission using a magnetic field. The system comprises means for generating a magnetic field and effecting variation of the magnetic field in correspondence with data to be transmitted. The varied magnetic field is then transmitted and subsequently received and decoded in order to retrieve the carried data.
Description
"Magnetic Transmission"
This invention relates to a data transmission system.
5 More particularly, the invention relates to magnetic induction transmission, over a distance, of data such as voice, measurements^ computer bytes, video, etc, that is any analogue or digital signals that can be processed onto a modulated carrier or; in such configuration that it can be Q transmitted and recognised by the systems using this invention.
According to the present invention there is provided a data transmission system comprising means for generating a S magnetic field means -for effecting variations to said magnetic field in correspondence with data to be transmitted, means for transmitting said varied magnetic field, and means for receiving and decoding said transmitted magnetic field in order to retrieve the transmitted data. D
Further according to the present invention there is provided a method of transmitting data comprising the steps of generating a magnetic field; varying said magnetic field in correspondence with data to be transmitted, transmitting 5 said varied magnetic field and receiving and decoding said
transmitted magnetic field in order to retrieve the carried data.
Thus, the invention involves the transmission of signals by generation of a recognisable magnetic field (preferably by modulation) and reception of the signal by measurements of the transmitted magnetic field as a vehicle for transfer of information.
' Embodiments of the present invention will now be described, by way of example, with reference to the attached drawing which shows one implementation of the system of the invention.
With reference to the drawing, a data transmission system comprises a magnetic field transmitter 1 which receives data from a number of data collection devices 2 which in the particular application illustrated could be temperature, pressure, flow rate; etc. The transmitter 1 is located in a bore hole 20 and encodes the data transmitting it through the creation of a modulated magnetic field, which is received by a receiver 10 located, for example, on the sea¬ bed.
Alternatively, the receiver may be a receiver 11 located on a drilling platform, a receiver 12 located on a floating vessel or a receiver 13 located on-shore.
The generation of the transmitted magnetic field may be provided, for example; by electrical coil induction within a body of matter; the reception being made by measurements with sensors responding to magnetic field variations such as magnetometers, Hall effect generators, fluxgates, induction coils, etc.
As in the case of data and signals transmitted by means of electro-magnetic carriers, this invention has a large variety of applications making use of signal differentiation by frequency or amplitude modulation; phase shift or rotation, time delay, etc.
The invention finds applications in the transmission of signals in environments not easily permeable to, or saturated by, electro-magnetic waves; such as environments buried within or shadowed by a large land mass, concrete shelters or other constructions; under water, etc.
The invention is particularly useful for the transmission of data and information collected deep inside hydrocarbon or geothermic wells, where pressures, temperatures and flows are recorded for good management of the reservoirs; inside mines and natural caves for communication and safety; underwater for communication, navigation and data gathering between surface and submerged boats, beacons, automatic recording stations, remotely operated wellheads, etc. all without the use of hard wired links between the transmitter and receivers.
The described mode of transmission is not limited to earth bound applicatons, and the invention has application in space or within or outside of anybody of matter, provided that this body of matter does not, by the physics of its properties, attenuate too quickly the magnetic field (principal mode of transfer of information) generated for the signal transmission.
Modifications and improvements may be incorporated without departing from the scope of the invention.
Claims
1. A data transmission system comprising means for generating a magnetic field, means for effecting variations 5 to said magnetic field in correspondence with data to be transmitted, means for transmitting said varied magnetic field, and means for receiving and decoding said transmitted magnetic field in order to retrieve the transmitted data.
10 2. A system as claimed in Claim 1, wherein said means for generating a magnetic field comprises electrical coil induction within a body of matter.
3. A system as claimed in either preceding claim, wherein 15. said variation in said magnetic field comprises frequency modulation, amplitude modulation, phase shift, phase rotation, or time delay.
4. A system as claimed in any preceding claim, wherein said 20 means for receiving and decoding said transmitted magnetic field is responsive to variations in said field.
5. A data transmission system substantially as hereinbefore described with reference to the accompanying drawing.
25_
6. A method of transmitting data comprising the steps of generating a magnetic field, varying said magnetic field in correspondence with data to be transmitted, transmitting said varied magnetic field and receiving and decoding said
30 transmitted magnetic field in order to retrieve the carried data.
7. A method of transmitting data substantially as hereinbefore described with reference to the accompanying
353 drawing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB858531368A GB8531368D0 (en) | 1985-12-20 | 1985-12-20 | Data transmission system |
| GB8531368 | 1985-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1987004028A1 true WO1987004028A1 (en) | 1987-07-02 |
Family
ID=10590044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1986/000787 WO1987004028A1 (en) | 1985-12-20 | 1986-12-22 | Magnetic transmission |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0263833A1 (en) |
| AU (1) | AU6778887A (en) |
| GB (1) | GB8531368D0 (en) |
| WO (1) | WO1987004028A1 (en) |
Cited By (58)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0699822A2 (en) * | 1994-09-03 | 1996-03-06 | Integrated Drilling Services Limited | A well data telemetry system |
| GB2292869A (en) * | 1994-09-03 | 1996-03-06 | Integrated Drilling Serv Ltd | A Well Data Telemetry System |
| US6057784A (en) * | 1997-09-02 | 2000-05-02 | Schlumberger Technology Corporatioin | Apparatus and system for making at-bit measurements while drilling |
| US6188222B1 (en) | 1997-09-19 | 2001-02-13 | Schlumberger Technology Corporation | Method and apparatus for measuring resistivity of an earth formation |
| GB2377131A (en) * | 2001-04-23 | 2002-12-31 | Schlumberger Holdings | Subsea communications |
| US7711322B2 (en) | 2005-06-15 | 2010-05-04 | Wireless Fibre Systems | Underwater communications system and method |
| US8131213B2 (en) | 2005-06-15 | 2012-03-06 | Wfs Technologies Ltd. | Sea vessel tagging apparatus and system |
| US8305227B2 (en) | 2005-06-15 | 2012-11-06 | Wfs Technologies Ltd. | Wireless auxiliary monitoring and control system for an underwater installation |
| WO2016118791A1 (en) * | 2015-01-23 | 2016-07-28 | Lockheed Martin Corporation | Dnv magnetic field detector |
| US9541610B2 (en) | 2015-02-04 | 2017-01-10 | Lockheed Martin Corporation | Apparatus and method for recovery of three dimensional magnetic field from a magnetic detection system |
| US9551763B1 (en) | 2016-01-21 | 2017-01-24 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensor with common RF and magnetic fields generator |
| US9557391B2 (en) | 2015-01-23 | 2017-01-31 | Lockheed Martin Corporation | Apparatus and method for high sensitivity magnetometry measurement and signal processing in a magnetic detection system |
| US9590601B2 (en) | 2014-04-07 | 2017-03-07 | Lockheed Martin Corporation | Energy efficient controlled magnetic field generator circuit |
| US9614589B1 (en) | 2015-12-01 | 2017-04-04 | Lockheed Martin Corporation | Communication via a magnio |
| US9638821B2 (en) | 2014-03-20 | 2017-05-02 | Lockheed Martin Corporation | Mapping and monitoring of hydraulic fractures using vector magnetometers |
| WO2017127093A1 (en) * | 2016-01-21 | 2017-07-27 | Lockheed Martin Corporation | Hydrophone |
| US9720055B1 (en) | 2016-01-21 | 2017-08-01 | Lockheed Martin Corporation | Magnetometer with light pipe |
| US9824597B2 (en) | 2015-01-28 | 2017-11-21 | Lockheed Martin Corporation | Magnetic navigation methods and systems utilizing power grid and communication network |
| US9823313B2 (en) | 2016-01-21 | 2017-11-21 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensor with circuitry on diamond |
| US9829545B2 (en) | 2015-11-20 | 2017-11-28 | Lockheed Martin Corporation | Apparatus and method for hypersensitivity detection of magnetic field |
| US9835693B2 (en) | 2016-01-21 | 2017-12-05 | Lockheed Martin Corporation | Higher magnetic sensitivity through fluorescence manipulation by phonon spectrum control |
| US9845153B2 (en) | 2015-01-28 | 2017-12-19 | Lockheed Martin Corporation | In-situ power charging |
| US9853837B2 (en) | 2014-04-07 | 2017-12-26 | Lockheed Martin Corporation | High bit-rate magnetic communication |
| US9910104B2 (en) | 2015-01-23 | 2018-03-06 | Lockheed Martin Corporation | DNV magnetic field detector |
| US9910105B2 (en) | 2014-03-20 | 2018-03-06 | Lockheed Martin Corporation | DNV magnetic field detector |
| US10006973B2 (en) | 2016-01-21 | 2018-06-26 | Lockheed Martin Corporation | Magnetometer with a light emitting diode |
| US10012704B2 (en) | 2015-11-04 | 2018-07-03 | Lockheed Martin Corporation | Magnetic low-pass filter |
| US10088452B2 (en) | 2016-01-12 | 2018-10-02 | Lockheed Martin Corporation | Method for detecting defects in conductive materials based on differences in magnetic field characteristics measured along the conductive materials |
| US10088336B2 (en) | 2016-01-21 | 2018-10-02 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensed ferro-fluid hydrophone |
| US10120039B2 (en) | 2015-11-20 | 2018-11-06 | Lockheed Martin Corporation | Apparatus and method for closed loop processing for a magnetic detection system |
| US10126377B2 (en) | 2016-05-31 | 2018-11-13 | Lockheed Martin Corporation | Magneto-optical defect center magnetometer |
| US10145910B2 (en) | 2017-03-24 | 2018-12-04 | Lockheed Martin Corporation | Photodetector circuit saturation mitigation for magneto-optical high intensity pulses |
| US10168393B2 (en) | 2014-09-25 | 2019-01-01 | Lockheed Martin Corporation | Micro-vacancy center device |
| US10228429B2 (en) | 2017-03-24 | 2019-03-12 | Lockheed Martin Corporation | Apparatus and method for resonance magneto-optical defect center material pulsed mode referencing |
| US10241158B2 (en) | 2015-02-04 | 2019-03-26 | Lockheed Martin Corporation | Apparatus and method for estimating absolute axes' orientations for a magnetic detection system |
| US10274550B2 (en) | 2017-03-24 | 2019-04-30 | Lockheed Martin Corporation | High speed sequential cancellation for pulsed mode |
| US10281550B2 (en) | 2016-11-14 | 2019-05-07 | Lockheed Martin Corporation | Spin relaxometry based molecular sequencing |
| US10317279B2 (en) | 2016-05-31 | 2019-06-11 | Lockheed Martin Corporation | Optical filtration system for diamond material with nitrogen vacancy centers |
| US10330744B2 (en) | 2017-03-24 | 2019-06-25 | Lockheed Martin Corporation | Magnetometer with a waveguide |
| US10338163B2 (en) | 2016-07-11 | 2019-07-02 | Lockheed Martin Corporation | Multi-frequency excitation schemes for high sensitivity magnetometry measurement with drift error compensation |
| US10338164B2 (en) | 2017-03-24 | 2019-07-02 | Lockheed Martin Corporation | Vacancy center material with highly efficient RF excitation |
| US10338162B2 (en) | 2016-01-21 | 2019-07-02 | Lockheed Martin Corporation | AC vector magnetic anomaly detection with diamond nitrogen vacancies |
| US10345396B2 (en) | 2016-05-31 | 2019-07-09 | Lockheed Martin Corporation | Selected volume continuous illumination magnetometer |
| US10345395B2 (en) | 2016-12-12 | 2019-07-09 | Lockheed Martin Corporation | Vector magnetometry localization of subsurface liquids |
| US10359479B2 (en) | 2017-02-20 | 2019-07-23 | Lockheed Martin Corporation | Efficient thermal drift compensation in DNV vector magnetometry |
| US10371765B2 (en) | 2016-07-11 | 2019-08-06 | Lockheed Martin Corporation | Geolocation of magnetic sources using vector magnetometer sensors |
| US10371760B2 (en) | 2017-03-24 | 2019-08-06 | Lockheed Martin Corporation | Standing-wave radio frequency exciter |
| US10379174B2 (en) | 2017-03-24 | 2019-08-13 | Lockheed Martin Corporation | Bias magnet array for magnetometer |
| US10408890B2 (en) | 2017-03-24 | 2019-09-10 | Lockheed Martin Corporation | Pulsed RF methods for optimization of CW measurements |
| US10459041B2 (en) | 2017-03-24 | 2019-10-29 | Lockheed Martin Corporation | Magnetic detection system with highly integrated diamond nitrogen vacancy sensor |
| US10520558B2 (en) | 2016-01-21 | 2019-12-31 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensor with nitrogen-vacancy center diamond located between dual RF sources |
| US10527746B2 (en) | 2016-05-31 | 2020-01-07 | Lockheed Martin Corporation | Array of UAVS with magnetometers |
| US10558260B2 (en) | 2017-12-15 | 2020-02-11 | Microsoft Technology Licensing, Llc | Detecting the pose of an out-of-range controller |
| US10571530B2 (en) | 2016-05-31 | 2020-02-25 | Lockheed Martin Corporation | Buoy array of magnetometers |
| US10677953B2 (en) | 2016-05-31 | 2020-06-09 | Lockheed Martin Corporation | Magneto-optical detecting apparatus and methods |
| US10735107B2 (en) | 2005-06-15 | 2020-08-04 | Wfs Technologies Ltd. | Communications system |
| US10945211B2 (en) | 2013-02-25 | 2021-03-09 | Wfs Technologies Ltd. | Underwater power saving mechanism for use in an communication network |
| US11750300B2 (en) | 2005-06-15 | 2023-09-05 | CSignum Ltd. | Mobile device underwater communications system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3967201A (en) * | 1974-01-25 | 1976-06-29 | Develco, Inc. | Wireless subterranean signaling method |
| EP0050523A2 (en) * | 1980-10-20 | 1982-04-28 | Honeywell Information Systems Inc. | Electromagnetic transmission using a curl-free magnetic vector potential field |
| US4363137A (en) * | 1979-07-23 | 1982-12-07 | Occidental Research Corporation | Wireless telemetry with magnetic induction field |
-
1985
- 1985-12-20 GB GB858531368A patent/GB8531368D0/en active Pending
-
1986
- 1986-12-22 EP EP87900226A patent/EP0263833A1/en not_active Withdrawn
- 1986-12-22 AU AU67788/87A patent/AU6778887A/en not_active Abandoned
- 1986-12-22 WO PCT/GB1986/000787 patent/WO1987004028A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3967201A (en) * | 1974-01-25 | 1976-06-29 | Develco, Inc. | Wireless subterranean signaling method |
| US4363137A (en) * | 1979-07-23 | 1982-12-07 | Occidental Research Corporation | Wireless telemetry with magnetic induction field |
| EP0050523A2 (en) * | 1980-10-20 | 1982-04-28 | Honeywell Information Systems Inc. | Electromagnetic transmission using a curl-free magnetic vector potential field |
Cited By (91)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0699822A2 (en) * | 1994-09-03 | 1996-03-06 | Integrated Drilling Services Limited | A well data telemetry system |
| GB2292869A (en) * | 1994-09-03 | 1996-03-06 | Integrated Drilling Serv Ltd | A Well Data Telemetry System |
| EP0699822A3 (en) * | 1994-09-03 | 1997-01-29 | Integrated Drilling Serv Ltd | A well data telemetry system |
| US5818352A (en) * | 1994-09-03 | 1998-10-06 | Integrated Drilling Services Limited | Well data telemetry system |
| GB2292869B (en) * | 1994-09-03 | 1999-01-06 | Integrated Drilling Serv Ltd | A well data telemetry system |
| US6057784A (en) * | 1997-09-02 | 2000-05-02 | Schlumberger Technology Corporatioin | Apparatus and system for making at-bit measurements while drilling |
| US6188222B1 (en) | 1997-09-19 | 2001-02-13 | Schlumberger Technology Corporation | Method and apparatus for measuring resistivity of an earth formation |
| GB2377131A (en) * | 2001-04-23 | 2002-12-31 | Schlumberger Holdings | Subsea communications |
| GB2377131B (en) * | 2001-04-23 | 2006-01-25 | Schlumberger Holdings | Subsea communication systems and techniques |
| US7123162B2 (en) | 2001-04-23 | 2006-10-17 | Schlumberger Technology Corporation | Subsea communication system and technique |
| US8515343B2 (en) | 2005-06-15 | 2013-08-20 | Wfs Technologies Ltd. | Water based vehicle communications system |
| US7711322B2 (en) | 2005-06-15 | 2010-05-04 | Wireless Fibre Systems | Underwater communications system and method |
| US7873316B2 (en) | 2005-06-15 | 2011-01-18 | Wfs Technologies Ltd. | Underwater communications system |
| US7877059B2 (en) | 2005-06-15 | 2011-01-25 | Wfs Technologies Ltd. | Underwater communications system comprising relay transceiver |
| US8045919B2 (en) | 2005-06-15 | 2011-10-25 | WFS Technologies, Ltd. | Electromagnetic/acoustic underwater communications system |
| US8055193B2 (en) | 2005-06-15 | 2011-11-08 | Wfs Technologies Ltd. | Underwater remote sensing |
| US8131213B2 (en) | 2005-06-15 | 2012-03-06 | Wfs Technologies Ltd. | Sea vessel tagging apparatus and system |
| US8305227B2 (en) | 2005-06-15 | 2012-11-06 | Wfs Technologies Ltd. | Wireless auxiliary monitoring and control system for an underwater installation |
| US8315560B2 (en) | 2005-06-15 | 2012-11-20 | Wfs Technologies Ltd. | Underwater navigation |
| US8326219B2 (en) | 2005-06-15 | 2012-12-04 | WFS Technolgies Ltd. | Communications system |
| US8331856B2 (en) | 2005-06-15 | 2012-12-11 | Wfs Technologies Ltd. | Underwater camera communication system |
| US8335469B2 (en) | 2005-06-15 | 2012-12-18 | Wfs Technologies, Inc. | Communications system |
| US8346165B2 (en) | 2005-06-15 | 2013-01-01 | Wfs Technologies Ltd. | Diver audio communication system |
| US8346164B2 (en) | 2005-06-15 | 2013-01-01 | Wfs Technologies Ltd. | Underwater communication system |
| US8358973B2 (en) | 2005-06-15 | 2013-01-22 | Wfs Technologies Ltd. | Communications system |
| US8364078B2 (en) | 2005-06-15 | 2013-01-29 | Wfs Technologies Ltd. | Communications system |
| US8385821B2 (en) | 2005-06-15 | 2013-02-26 | Wfs Technologies Ltd. | Underwater vehicle communications system |
| US8515344B2 (en) | 2005-06-15 | 2013-08-20 | Wfs Technologies Ltd. | Diver communication system |
| US7853206B2 (en) | 2005-06-15 | 2010-12-14 | WFS Technologies, Ltd. | Underwater communications system with adaptable carrier frequency |
| US10735107B2 (en) | 2005-06-15 | 2020-08-04 | Wfs Technologies Ltd. | Communications system |
| US10742331B2 (en) | 2005-06-15 | 2020-08-11 | Wfs Technologies Ltd. | Communications system |
| US11063674B2 (en) | 2005-06-15 | 2021-07-13 | CSignum Ltd. | Communications system |
| US11075701B2 (en) | 2005-06-15 | 2021-07-27 | CSignum Ltd. | Communications system |
| US11750300B2 (en) | 2005-06-15 | 2023-09-05 | CSignum Ltd. | Mobile device underwater communications system and method |
| US10945211B2 (en) | 2013-02-25 | 2021-03-09 | Wfs Technologies Ltd. | Underwater power saving mechanism for use in an communication network |
| US9638821B2 (en) | 2014-03-20 | 2017-05-02 | Lockheed Martin Corporation | Mapping and monitoring of hydraulic fractures using vector magnetometers |
| US9823381B2 (en) | 2014-03-20 | 2017-11-21 | Lockheed Martin Corporation | Mapping and monitoring of hydraulic fractures using vector magnetometers |
| US9910105B2 (en) | 2014-03-20 | 2018-03-06 | Lockheed Martin Corporation | DNV magnetic field detector |
| US10725124B2 (en) | 2014-03-20 | 2020-07-28 | Lockheed Martin Corporation | DNV magnetic field detector |
| US10277208B2 (en) | 2014-04-07 | 2019-04-30 | Lockheed Martin Corporation | Energy efficient controlled magnetic field generator circuit |
| US9590601B2 (en) | 2014-04-07 | 2017-03-07 | Lockheed Martin Corporation | Energy efficient controlled magnetic field generator circuit |
| US9853837B2 (en) | 2014-04-07 | 2017-12-26 | Lockheed Martin Corporation | High bit-rate magnetic communication |
| US10168393B2 (en) | 2014-09-25 | 2019-01-01 | Lockheed Martin Corporation | Micro-vacancy center device |
| US9557391B2 (en) | 2015-01-23 | 2017-01-31 | Lockheed Martin Corporation | Apparatus and method for high sensitivity magnetometry measurement and signal processing in a magnetic detection system |
| WO2016118791A1 (en) * | 2015-01-23 | 2016-07-28 | Lockheed Martin Corporation | Dnv magnetic field detector |
| US10466312B2 (en) | 2015-01-23 | 2019-11-05 | Lockheed Martin Corporation | Methods for detecting a magnetic field acting on a magneto-optical detect center having pulsed excitation |
| US9910104B2 (en) | 2015-01-23 | 2018-03-06 | Lockheed Martin Corporation | DNV magnetic field detector |
| US9845153B2 (en) | 2015-01-28 | 2017-12-19 | Lockheed Martin Corporation | In-situ power charging |
| US9824597B2 (en) | 2015-01-28 | 2017-11-21 | Lockheed Martin Corporation | Magnetic navigation methods and systems utilizing power grid and communication network |
| US10241158B2 (en) | 2015-02-04 | 2019-03-26 | Lockheed Martin Corporation | Apparatus and method for estimating absolute axes' orientations for a magnetic detection system |
| US10408889B2 (en) | 2015-02-04 | 2019-09-10 | Lockheed Martin Corporation | Apparatus and method for recovery of three dimensional magnetic field from a magnetic detection system |
| US9541610B2 (en) | 2015-02-04 | 2017-01-10 | Lockheed Martin Corporation | Apparatus and method for recovery of three dimensional magnetic field from a magnetic detection system |
| US10012704B2 (en) | 2015-11-04 | 2018-07-03 | Lockheed Martin Corporation | Magnetic low-pass filter |
| US9829545B2 (en) | 2015-11-20 | 2017-11-28 | Lockheed Martin Corporation | Apparatus and method for hypersensitivity detection of magnetic field |
| US10120039B2 (en) | 2015-11-20 | 2018-11-06 | Lockheed Martin Corporation | Apparatus and method for closed loop processing for a magnetic detection system |
| US10333588B2 (en) | 2015-12-01 | 2019-06-25 | Lockheed Martin Corporation | Communication via a magnio |
| US9614589B1 (en) | 2015-12-01 | 2017-04-04 | Lockheed Martin Corporation | Communication via a magnio |
| US10088452B2 (en) | 2016-01-12 | 2018-10-02 | Lockheed Martin Corporation | Method for detecting defects in conductive materials based on differences in magnetic field characteristics measured along the conductive materials |
| US9835693B2 (en) | 2016-01-21 | 2017-12-05 | Lockheed Martin Corporation | Higher magnetic sensitivity through fluorescence manipulation by phonon spectrum control |
| US10088336B2 (en) | 2016-01-21 | 2018-10-02 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensed ferro-fluid hydrophone |
| US9551763B1 (en) | 2016-01-21 | 2017-01-24 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensor with common RF and magnetic fields generator |
| WO2017127093A1 (en) * | 2016-01-21 | 2017-07-27 | Lockheed Martin Corporation | Hydrophone |
| US9720055B1 (en) | 2016-01-21 | 2017-08-01 | Lockheed Martin Corporation | Magnetometer with light pipe |
| US9817081B2 (en) | 2016-01-21 | 2017-11-14 | Lockheed Martin Corporation | Magnetometer with light pipe |
| US9823313B2 (en) | 2016-01-21 | 2017-11-21 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensor with circuitry on diamond |
| US9823314B2 (en) | 2016-01-21 | 2017-11-21 | Lockheed Martin Corporation | Magnetometer with a light emitting diode |
| US9835694B2 (en) | 2016-01-21 | 2017-12-05 | Lockheed Martin Corporation | Higher magnetic sensitivity through fluorescence manipulation by phonon spectrum control |
| US10520558B2 (en) | 2016-01-21 | 2019-12-31 | Lockheed Martin Corporation | Diamond nitrogen vacancy sensor with nitrogen-vacancy center diamond located between dual RF sources |
| US10338162B2 (en) | 2016-01-21 | 2019-07-02 | Lockheed Martin Corporation | AC vector magnetic anomaly detection with diamond nitrogen vacancies |
| US10006973B2 (en) | 2016-01-21 | 2018-06-26 | Lockheed Martin Corporation | Magnetometer with a light emitting diode |
| US10677953B2 (en) | 2016-05-31 | 2020-06-09 | Lockheed Martin Corporation | Magneto-optical detecting apparatus and methods |
| US10571530B2 (en) | 2016-05-31 | 2020-02-25 | Lockheed Martin Corporation | Buoy array of magnetometers |
| US10317279B2 (en) | 2016-05-31 | 2019-06-11 | Lockheed Martin Corporation | Optical filtration system for diamond material with nitrogen vacancy centers |
| US10126377B2 (en) | 2016-05-31 | 2018-11-13 | Lockheed Martin Corporation | Magneto-optical defect center magnetometer |
| US10345396B2 (en) | 2016-05-31 | 2019-07-09 | Lockheed Martin Corporation | Selected volume continuous illumination magnetometer |
| US10527746B2 (en) | 2016-05-31 | 2020-01-07 | Lockheed Martin Corporation | Array of UAVS with magnetometers |
| US10371765B2 (en) | 2016-07-11 | 2019-08-06 | Lockheed Martin Corporation | Geolocation of magnetic sources using vector magnetometer sensors |
| US10338163B2 (en) | 2016-07-11 | 2019-07-02 | Lockheed Martin Corporation | Multi-frequency excitation schemes for high sensitivity magnetometry measurement with drift error compensation |
| US10281550B2 (en) | 2016-11-14 | 2019-05-07 | Lockheed Martin Corporation | Spin relaxometry based molecular sequencing |
| US10345395B2 (en) | 2016-12-12 | 2019-07-09 | Lockheed Martin Corporation | Vector magnetometry localization of subsurface liquids |
| US10359479B2 (en) | 2017-02-20 | 2019-07-23 | Lockheed Martin Corporation | Efficient thermal drift compensation in DNV vector magnetometry |
| US10330744B2 (en) | 2017-03-24 | 2019-06-25 | Lockheed Martin Corporation | Magnetometer with a waveguide |
| US10228429B2 (en) | 2017-03-24 | 2019-03-12 | Lockheed Martin Corporation | Apparatus and method for resonance magneto-optical defect center material pulsed mode referencing |
| US10338164B2 (en) | 2017-03-24 | 2019-07-02 | Lockheed Martin Corporation | Vacancy center material with highly efficient RF excitation |
| US10459041B2 (en) | 2017-03-24 | 2019-10-29 | Lockheed Martin Corporation | Magnetic detection system with highly integrated diamond nitrogen vacancy sensor |
| US10408890B2 (en) | 2017-03-24 | 2019-09-10 | Lockheed Martin Corporation | Pulsed RF methods for optimization of CW measurements |
| US10379174B2 (en) | 2017-03-24 | 2019-08-13 | Lockheed Martin Corporation | Bias magnet array for magnetometer |
| US10371760B2 (en) | 2017-03-24 | 2019-08-06 | Lockheed Martin Corporation | Standing-wave radio frequency exciter |
| US10145910B2 (en) | 2017-03-24 | 2018-12-04 | Lockheed Martin Corporation | Photodetector circuit saturation mitigation for magneto-optical high intensity pulses |
| US10274550B2 (en) | 2017-03-24 | 2019-04-30 | Lockheed Martin Corporation | High speed sequential cancellation for pulsed mode |
| US10558260B2 (en) | 2017-12-15 | 2020-02-11 | Microsoft Technology Licensing, Llc | Detecting the pose of an out-of-range controller |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8531368D0 (en) | 1986-02-05 |
| EP0263833A1 (en) | 1988-04-20 |
| AU6778887A (en) | 1987-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO1987004028A1 (en) | Magnetic transmission | |
| US6018501A (en) | Subsea repeater and method for use of the same | |
| CA1062336A (en) | Electromagnetic lithosphere telemetry system | |
| US6018301A (en) | Disposable electromagnetic signal repeater | |
| RU2005103224A (en) | Borehole Telemetry System (OPTIONS) AND METHOD OF GEOPHYSICAL RESEARCH DURING DRILLING (OPTIONS) | |
| AU726088B2 (en) | Device and method for transmitting information by electromagnetic waves | |
| US9771792B2 (en) | Method and apparatus for multi-channel downhole electromagnetic telemetry | |
| US6175809B1 (en) | Immersible seismic emission device and implementation method | |
| US20100182161A1 (en) | Wireless telemetry repeater systems and methods | |
| GB2458944A (en) | Subsea wellbore with RF communication system | |
| US7982679B2 (en) | Transmission of underwater electromagnetic radiation through the seabed | |
| US5959548A (en) | Electromagnetic signal pickup device | |
| US20090207041A1 (en) | Downhole measurement while drilling system and method | |
| US20180337737A1 (en) | Communication system network | |
| WO2013068739A2 (en) | Improved monitoring of subsea installations | |
| JPS6352087A (en) | Initial setting method and device for earthquake data collector | |
| WO1998007049A2 (en) | Reservoir acquisition system with concentrator | |
| JPH0968575A (en) | Measurement system for underwater data | |
| WO1998007049A9 (en) | Reservoir acquisition system with concentrator | |
| Duennebier et al. | underwThe Hawaii-2 Observatory seismic system | |
| US20210135769A1 (en) | Under-liquid communication using magneto-quasistatic signals | |
| Coates | A deep-ocean penetrator telemetry system | |
| CN115182402B (en) | Submarine rock medium through-the-earth communication device and use method thereof | |
| Ryerson | A High Data Rate Underwater Acoustic Telemetry System | |
| Morgera | Multiple terminal acoustic communications system design |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU JP US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LU NL SE |